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Title: Rotational excitation of the interstellar NH 2 radical by H 2

We present quantum close-coupling calculations for the rotational excitation of the interstellar amidogen radical NH 2 due to collisions with H 2 molecules. The calculations are based on a recent, high-accuracy full-dimensional NH 4 potential energy surface adapted for rigid-rotor scattering calculations. The collisional cross section calculations are performed for all transitions among the first 15 energy levels of both ortho- and para-NH 2 and for total energies up to 1500 cm −1. Both para- and ortho-H 2 colliding partners are considered. The cross sections for collision with para- and ortho-H 2 are found to differ significantly, the magnitude of the ortho-H 2 ones being dominant. No strong propensity rules are observed but transitions with Δk c=0 are slightly favored
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [3] ; ORCiD logo [3]
  1. CNRS-Univ. du Havre, Le Havre (France)
  2. Inst. de Planétologie et d’Astrophysique de Grenoble (IPAG), Grenoble (France)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Grant/Contract Number:
SC0015997
Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 146; Journal Issue: 6; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of New Mexico, Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1465745
Alternate Identifier(s):
OSTI ID: 1361765